CMS-PAS-TOP-16-011

CMS-PAS-TOP-16-011
Measurement of the differential cross section for $\mathrm{t \bar t}$ production in the dilepton final state at $\sqrt{s}=$ 13 TeV
CMS Collaboration
March 2016

Abstract: Measurements of normalized differential top quark pair ( $\mathrm{t \bar t}$ ) production cross sections in proton-proton collisions at a centre-of-mass energy of 13 TeV at the CERN LHC are presented. The data were recorded in 2015 with the CMS detector and correspond to an integrated luminosity of 2.2 fb $^{-1}$ . The measurements are performed in the dilepton decay channels ( $\mathrm{e^+e^-}$ , $\mu^+\mu^-$ , and $\mu^{\pm} \mathrm{e^{\mp}}$ ). The $\mathrm{t \bar t}$ production cross section is measured as a function of kinematics of the top quarks, the $\mathrm{t \bar t}$ system, and of the number of jets in the event. The results are compared with several perturbative QCD calculations and are found to be broadly in agreement with the predictions.
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